Vanilla Taste
The MC's are childhood friends, going back to Elementary school. The seme is a cliché cold hearted guy, who is good at everything except sympathizing with others. He doesn't get along with other people, except for the Uke. The uke is a charismatic, friendly air-headed guy, who managed to befriend the seme exactly bc of said personality. The uke has had a crush on his friend for years (and most likely vise versa) but has hidden it well, so far (maybe). They live together and suddenly begin a BDSM relationship bc of the most trivial reason: A misdelivered package. It's really random how they all of a sudden begin doing BDSM stuff together just bc the uke found a pair of handcuffs that were supposed to be delivered to the seme. They have supposedly hidden their feelings for each other for years, yet that's all it takes for them to step over that boundary. I read it for the smut and BDSM, though. So while it's unrealistic and silly, I try to overlook it and just enjoy the parts I came to read.
My Quiet Best Friend's Just Tongue-Tied